Continuous microwave hole burning and population oscillations in a diamond spin ensemble
arXiv:1909.01050 · doi:10.1103/PhysRevB.100.214407
Abstract
Continuous spectral hole burning and spin-level population oscillations are studied in an inhomogeneously broadened diamond-based spin ensemble composed of substitutional nitrogen and nitrogen-vacancy centres created through neutron irradiation and annealing. The burnt spectral features highlight a detuning-dependent homogeneous hole linewidth that is up to three orders of magnitude narrower than the total inhomogeneous ensemble linewidth. Continuous population oscillations are observed to quickly decay beyond a pump and probe detuning of 5 Hz, and are numerically modelled using a five-level system of coupled rate equations. Fourier analysis of these oscillations highlight discrete C hyperfine interactions, with energies within the inhomogeneous ensemble linewidth, as well as suspected nuclear -spin coupled signatures likely related to the Li byproduct of neutron irradiation.
arXiv comment10 pages, 8 figures
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